Janmāṣṭamī

1. १Step 1, Aṅga

   Aṣṭamī runs from 20:56 on Sun 29 Aug to 23:30 on Mon 30 Aug.

   2021-08-29T17:55:43Z → 2021-08-30T20:30:07Z
2. २Step 2, Kāla

   Niśītha is 1 ghaṭikā either side of midnight: 23:11–23:59 on the 29th, 23:10–23:58 on the 30th.

   nishita: midnight-pm-1-ghatika · sunrise and sunset: upper limb, 31′ + 16′
3. ३Step 3, Rule

   Aṣṭamī must be present during niśītha. It covers 48 of 48 minutes on the 29th and 20 of 48 on the 30th.

   Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103
4. ४Step 4, Tie-break

   Both nights qualify. Paraviddhā: the second is taken.

   priority: paraviddha → paraviddha · margin 1178 s
5. ५Step 5, Ruling

   Janmāṣṭamī, Doha, 2021: Monday 30 August.

   confidence: determinate

In Doha, Janmāṣṭamī 2021 falls on Monday 30 August. Aṣṭamī runs from 20:56 on Sun 29 Aug to 23:30 on Mon 30 Aug and covers 20 of 48 minutes of niśītha that night. It also reaches the previous night for 48 minutes; by the rule the second night is taken.

Institutional rulings are recorded with a source address, and are never edited to agree.

Month

Śrāvaṇa, amānta

Pakṣa · aṅga

Kṛṣṇa · Aṣṭamī

Kāla

Niśītha

Priority

Paraviddhā

Tie-break

Second day

Reference

CRC 1955, p. 103

K 8 Janmastami (madhyaratra-vyapini), if midnight is covered on two days, or not on any day, it is to be observed on the 2nd day; special when combined with naksatra 'Rohini' at midnight, more so when on Monday or Wednesday. If the combination occurs before midnight and 'Rohini' extends up to midnight, it is to be observed on that day. Gokulastami. Calendar Reform Committee 1955, General Rules for Religious Festivals, p. 103.

The clauses on Rohiṇī nakṣatra, the Vaiṣṇava observance on the day after saptamī, and the Assam and South India reckoning in the solar month belong to other readings and are not applied.